I think why bitcoin is better than cash, because bitcoin can be used as a means of payment in the online world, bitcoin can also be a valuable asset investment and provide a big advantage over using cash. Then efficient and instant use of bitcoin makes bitcoin a lot of people use for payment in online stores because we do not need to convert our currency to the price of the item, otherwise we do not get cas when we transfer our bitcoin to someone different from cash. And bitcoin can not be played by the government or the state because bitcoin stands alone, bitcoin value is only affected by the amount of market demand, if the amount of market demand increases then bitcoin prices will also increase,